xref: /xnu-11215/osfmk/man/processor_set_info.html (revision 186b8fce)

<h2>processor_set_info</h2>
<hr>
<p>
<strong>Function</strong> - Return processor set state according to caller-specified flavor.
<h3>SYNOPSIS</h3>
<pre>
<strong>kern_return_t	processor_set_info</strong>
		<strong>(processor_set_name_t</strong>	<var>processor_set_name</var>,
		<strong>int</strong>	<var>flavor</var>,
		<strong>host_t</strong>	<var>host</var>,
		<strong>processor_set_info_t</strong>	<var>processor_set_info</var>,
		<strong>mach_msg_type_number_t</strong>	<var>processor_set_info_count</var><strong>);</strong>
</pre>
<h3>PARAMETERS</h3>
<dl>
<dt> <var>processor_set_name</var>
<dd>
[in processor-set-name send right]
A processor set name (or control)
port for which information is desired.
<dt> <var>flavor</var>
<dd>
[in scalar]
The type of information requested.
<dl>
<dt> <strong>PROCESSOR_SET_BASIC_INFO</strong>
<dd>
Basic information concerning the processor set (number of
assigned processors and default policy).  The returned structure
is defined by <strong>processor_set_basic_info</strong>.
<dt> <strong>PROCESSOR_SET_TIMESHARE_DEFAULT</strong>
<dd>
The base attributes for the timeshare scheduling policy.  The
returned structure is <strong>policy_timeshare_base</strong>.
<dt> <strong>PROCESSOR_SET_FIFO_DEFAULT</strong>
<dd>
The base attributes for the FIFO scheduling policy.  The
returned structure is <strong>policy_fifo_base</strong>.
<dt> <strong>PROCESSOR_SET_RR_DEFAULT</strong>
<dd>
The base attributes for the round-robin scheduling policy.  The
returned structure is <strong>policy_rr_base</strong>.
<dt> <strong>PROCESSOR_SET_TIMESHARE_LIMITS</strong>
<dd>
Limits on the allowed timeshare policy attributes.  The
returned structure is defined by <strong>policy_timeshare_limit</strong>.
<dt> <strong>PROCESSOR_SET_RR_LIMITS</strong>
<dd>
Limits on the allowed round robin policy attributes.  The
returned structure is defined by <strong>policy_rr_limit</strong>.
<dt> <strong>PROCESSOR_SET_FIFO_LIMITS</strong>
<dd>
Limits on the allowed first-in, first-out policy attributes.  The
returned structure is defined by <strong>policy_fifo_limit</strong>.
<dt> <strong>PROCESSOR_SET_ENABLED_POLICIES</strong>
<dd>
The set of enabled policies.  The returned data is a bit-vector.
</dl>
<dt> <var>host</var>
<dd>
[out host-name send right]
The name port for the host on which the
processor set resides.
<dt> <var>processor_set_info</var>
<dd>
[out structure]
Information about the processor set.
<dt> <var>processor_set_info_count</var>
<dd>
[in/out scalar]
On input, the maximum size of the buffer; on output, the
size returned (in natural-sized units).
</dl>
<h3>DESCRIPTION</h3>
<p>
The <strong>processor_set_info</strong> function returns selected information
for a processor set, as specified by <var>flavor</var>.
<h3>NOTES</h3>
<p>
A processor set has a single default scheduling policy in effect for it (as
returned by <strong>PROCESSOR_SET_BASIC_INFO</strong>), so only one of the default
scheduling structures has valid information.  On the other hand,
a processor set
maintains limits for all defined scheduling policies, so all
of the scheduling limit
structures return valid values.
<h3>RETURN VALUES</h3>
<p>
Only generic errors apply.
<h3>RELATED INFORMATION</h3>
<p>
Functions:
<a href="processor_set_statistics.html">processor_set_statistics</a>,
<a href="processor_set_create.html">processor_set_create</a>,
<a href="processor_set_default.html">processor_set_default</a>,
<a href="processor_assign.html">processor_assign</a>,
<a href="P_set_policy_control.html">processor_set_policy_control</a>.
<p>
Data Structures:
<a href="processor_set_basic_info.html">processor_set_basic_info</a>,
<a href="policy_timeshare_info.html">policy_timeshare_info</a>,
<a href="policy_rr_info.html">policy_rr_info</a>,
<a href="policy_fifo_info.html">policy_fifo_info</a>.